diff options
Diffstat (limited to 'framework/src/suricata/src/detect-classtype.c')
| -rw-r--r-- | framework/src/suricata/src/detect-classtype.c | 342 |
1 files changed, 0 insertions, 342 deletions
diff --git a/framework/src/suricata/src/detect-classtype.c b/framework/src/suricata/src/detect-classtype.c deleted file mode 100644 index bc773710..00000000 --- a/framework/src/suricata/src/detect-classtype.c +++ /dev/null @@ -1,342 +0,0 @@ -/* Copyright (C) 2007-2010 Open Information Security Foundation - * - * You can copy, redistribute or modify this Program under the terms of - * the GNU General Public License version 2 as published by the Free - * Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * version 2 along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA. - */ - -/** - * \file - * - * \author Anoop Saldanha <anoopsaldanha@gmail.com> - * - * Implements classtype keyword. - */ - -#include "suricata-common.h" -#include "decode.h" - -#include "detect.h" -#include "detect-parse.h" -#include "detect-engine.h" -#include "detect-engine-mpm.h" -#include "detect-classtype.h" -#include "flow-var.h" -#include "util-classification-config.h" -#include "util-error.h" -#include "util-debug.h" -#include "util-unittest.h" - -#define DETECT_CLASSTYPE_REGEX "^\\s*([a-zA-Z][a-zA-Z0-9-_]*)\\s*$" - -static pcre *regex = NULL; -static pcre_extra *regex_study = NULL; - -static int DetectClasstypeSetup(DetectEngineCtx *, Signature *, char *); -void DetectClasstypeRegisterTests(void); - -/** - * \brief Registers the handler functions for the "Classtype" keyword. - */ -void DetectClasstypeRegister(void) -{ - const char *eb = NULL; - int eo; - int opts = 0; - - SCLogDebug("Registering the Classtype keyword handler"); - - sigmatch_table[DETECT_CLASSTYPE].name = "classtype"; - sigmatch_table[DETECT_CLASSTYPE].desc = "information about the classification of rules and alerts"; - sigmatch_table[DETECT_CLASSTYPE].url = "https://redmine.openinfosecfoundation.org/projects/suricata/wiki/Meta-settings#Classtype"; - sigmatch_table[DETECT_CLASSTYPE].Match = NULL; - sigmatch_table[DETECT_CLASSTYPE].Setup = DetectClasstypeSetup; - sigmatch_table[DETECT_CLASSTYPE].Free = NULL; - sigmatch_table[DETECT_CLASSTYPE].RegisterTests = DetectClasstypeRegisterTests; - - regex = pcre_compile(DETECT_CLASSTYPE_REGEX, opts, &eb, &eo, NULL); - if (regex == NULL) { - SCLogError(SC_ERR_PCRE_COMPILE, "Compile of \"%s\" failed at offset %" PRId32 ": %s", - DETECT_CLASSTYPE_REGEX, eo, eb); - goto end; - } - - regex_study = pcre_study(regex, 0, &eb); - if (eb != NULL) { - SCLogError(SC_ERR_PCRE_STUDY, "pcre study failed: %s", eb); - goto end; - } - - end: - return; -} - -/** - * \brief Parses the raw string supplied with the "Classtype" keyword. - * - * \param Pointer to the string to be parsed. - * - * \retval bool success or failure. - */ -static int DetectClasstypeParseRawString(char *rawstr, char *out, size_t outsize) -{ -#define MAX_SUBSTRINGS 30 - int ret = 0; - int ov[MAX_SUBSTRINGS]; - size_t len = strlen(rawstr); - - /* get rid of the double quotes if present */ - if (rawstr[0] == '\"' && rawstr[strlen(rawstr) - 1] == '\"') { - rawstr++; - rawstr[strlen(rawstr) - 1] = '\0'; - len -= 2; - } - - ret = pcre_exec(regex, regex_study, rawstr, len, 0, 0, ov, 30); - if (ret < 0) { - SCLogError(SC_ERR_PCRE_MATCH, "Invalid Classtype in Signature"); - goto end; - } - - ret = pcre_copy_substring((char *)rawstr, ov, 30, 1, out, outsize); - if (ret < 0) { - SCLogError(SC_ERR_PCRE_GET_SUBSTRING, "pcre_copy_substring failed"); - goto end; - } - - return 0; - end: - return -1; -} - -/** - * \brief The setup function that would be called when the Signature parsing - * module encounters the "Classtype" keyword. - * - * \param de_ctx Pointer to the Detection Engine Context. - * \param s Pointer the current Signature instance that is being parsed. - * \param rawstr Pointer to the argument supplied to the classtype keyword. - * - * \retval 0 On success - * \retval -1 On failure - */ -static int DetectClasstypeSetup(DetectEngineCtx *de_ctx, Signature *s, char *rawstr) -{ - char parsed_ct_name[1024] = ""; - SCClassConfClasstype *ct = NULL; - - if (DetectClasstypeParseRawString(rawstr, parsed_ct_name, sizeof(parsed_ct_name)) < -1) { - SCLogError(SC_ERR_PCRE_PARSE, "Error parsing classtype argument supplied with the " - "classtype keyword"); - goto error; - } - - ct = SCClassConfGetClasstype(parsed_ct_name, de_ctx); - if (ct == NULL) { - SCLogError(SC_ERR_UNKNOWN_VALUE, "Unknown Classtype: \"%s\". Invalidating the Signature", - parsed_ct_name); - goto error; - } - - /* if we have retrieved the classtype, assign the message to be displayed - * for this Signature by fast.log, if a Packet matches this Signature */ - s->class = ct->classtype_id; - s->class_msg = ct->classtype_desc; - - /* if a priority keyword has appeared before the classtype, s->prio would - * hold a value which is != -1, in which case we don't overwrite the value. - * Otherwise, overwrite the value */ - if (s->prio == -1) - s->prio = ct->priority; - - return 0; - - error: - return -1; -} - -/*------------------------------Unittests-------------------------------------*/ - -#ifdef UNITTESTS - -/** - * \test Check that supplying an invalid classtype in the rule, results in the - * rule being invalidated. - */ -int DetectClasstypeTest01() -{ - int result = 0; - - DetectEngineCtx *de_ctx = DetectEngineCtxInit(); - if (de_ctx == NULL) { - goto end; - } - - FILE *fd = SCClassConfGenerateValidDummyClassConfigFD01(); - SCClassConfLoadClassficationConfigFile(de_ctx, fd); - - de_ctx->sig_list = SigInit(de_ctx, "alert tcp any any -> any any " - "(msg:\"Classtype test\"; " - "Classtype:not_available; sid:1;)"); - if (de_ctx->sig_list == NULL) - result = 1; - - DetectEngineCtxFree(de_ctx); - -end: - return result; -} - -/** - * \test Check that both valid and invalid classtypes in a rule are handled - * properly, with rules containing invalid classtypes being rejected - * and the ones containing valid classtypes parsed and returned. - */ -int DetectClasstypeTest02() -{ - int result = 0; - Signature *last = NULL; - Signature *sig = NULL; - - DetectEngineCtx *de_ctx = DetectEngineCtxInit(); - if (de_ctx == NULL) { - goto end; - } - - FILE *fd = SCClassConfGenerateValidDummyClassConfigFD01(); - SCClassConfLoadClassficationConfigFile(de_ctx, fd); - - sig = SigInit(de_ctx, "alert tcp any any -> any any " - "(msg:\"Classtype test\"; Classtype:bad-unknown; sid:1;)"); - if (sig == NULL) { - printf("first sig failed to parse: "); - result = 0; - goto end; - } - de_ctx->sig_list = last = sig; - result = (sig != NULL); - - sig = SigInit(de_ctx, "alert tcp any any -> any any " - "(msg:\"Classtype test\"; Classtype:not-there; sid:1;)"); - last->next = sig; - result &= (sig == NULL); - - sig = SigInit(de_ctx, "alert tcp any any -> any any " - "(msg:\"Classtype test\"; Classtype:Bad-UnkNown; sid:1;)"); - if (sig == NULL) { - printf("second sig failed to parse: "); - result = 0; - goto end; - } - last->next = sig; - last = sig; - result &= (sig != NULL); - - sig = SigInit(de_ctx, "alert tcp any any -> any any " - "(msg:\"Classtype test\"; Classtype:nothing-wrong; sid:1;)"); - if (sig == NULL) { - result = 0; - goto end; - } - last->next = sig; - last = sig; - result &= (sig != NULL); - - sig = SigInit(de_ctx, "alert tcp any any -> any any " - "(msg:\"Classtype test\"; Classtype:attempted_dos; sid:1;)"); - last->next = sig; - result &= (sig == NULL); - - SigCleanSignatures(de_ctx); - DetectEngineCtxFree(de_ctx); - -end: - return result; -} - -/** - * \test Check that the signatures are assigned priority based on classtype they - * are given. - */ -int DetectClasstypeTest03() -{ - int result = 0; - Signature *last = NULL; - Signature *sig = NULL; - - DetectEngineCtx *de_ctx = DetectEngineCtxInit(); - if (de_ctx == NULL) { - goto end; - } - - FILE *fd = SCClassConfGenerateValidDummyClassConfigFD01(); - SCClassConfLoadClassficationConfigFile(de_ctx, fd); - - sig = SigInit(de_ctx, "alert tcp any any -> any any " - "(msg:\"Classtype test\"; Classtype:bad-unknown; priority:1; sid:1;)"); - if (sig == NULL) { - result = 0; - goto end; - } - de_ctx->sig_list = last = sig; - result = (sig != NULL); - result &= (sig->prio == 1); - - sig = SigInit(de_ctx, "alert tcp any any -> any any " - "(msg:\"Classtype test\"; Classtype:unKnoWn; " - "priority:3; sid:1;)"); - if (sig == NULL) { - result = 0; - goto end; - } - last->next = sig; - last = sig; - result &= (sig != NULL); - result &= (sig->prio == 3); - - sig = SigInit(de_ctx, "alert tcp any any -> any any (msg:\"Classtype test\"; " - "Classtype:nothing-wrong; priority:1; sid:1;)"); - if (sig == NULL) { - result = 0; - goto end; - } - last->next = sig; - last = sig; - result &= (sig != NULL); - result &= (sig->prio == 1); - - - SigCleanSignatures(de_ctx); - DetectEngineCtxFree(de_ctx); - -end: - return result; -} - -#endif /* UNITTESTS */ - -/** - * \brief This function registers unit tests for Classification Config API. - */ -void DetectClasstypeRegisterTests(void) -{ - -#ifdef UNITTESTS - - UtRegisterTest("DetectClasstypeTest01", DetectClasstypeTest01, 1); - UtRegisterTest("DetectClasstypeTest02", DetectClasstypeTest02, 1); - UtRegisterTest("DetectClasstypeTest03", DetectClasstypeTest03, 1); - -#endif /* UNITTESTS */ - -} |